content: /*
   * Copyright 2016 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package hu.akarnokd.agera;
  
  import android.support.annotation.NonNull;
  
  import com.google.android.agera.Observable;
  import com.google.android.agera.Updatable;
  
  import java.util.concurrent.ConcurrentLinkedQueue;
  import java.util.concurrent.Executor;
  
  /**
   * Subscribes on the given ExecutorService to the wrapper source.
   */
  final class AgeraSubscribeOnExecutor extends AgeraTracking<Trampoline> {
  
      final Observable source;
  
      final Executor executor;
  
      AgeraSubscribeOnExecutor(Observable source, Executor executor) {
          this.source = source;
          this.executor = executor;
      }
  
  
      @NonNull
      @Override
      protected Trampoline createWrapper(@NonNull Updatable updatable) {
          return new Trampoline(new ConcurrentLinkedQueue<Runnable>(), executor);
      }
  
      @Override
      protected void onAdd(@NonNull final Updatable updatable, @NonNull Trampoline wrapper) {
          wrapper.offer(new Runnable() {
              @Override
              public void run() {
                  source.addUpdatable(updatable);
              }
          });
      }
  
      @Override
      protected void onRemove(@NonNull final Updatable updatable, @NonNull Trampoline wrapper) {
          wrapper.offer(new Runnable() {
              @Override
              public void run() {
                  source.removeUpdatable(updatable);
              }
          });
      }
  }
  
  